Interior designer cost in Luxembourg 2026

Interior design fees in Luxembourg reflect the country's overall high cost structure: senior designers charge significantly more than equivalent professionals in France, Belgium or Germany. The expat market — which represents a large share of demand in Luxembourg City, Kirchberg and the Cloche d'Or district — also drives a premium, as clients often require coordination in multiple languages and designers with international project experience.

VAT at 17% applies to interior design services in Luxembourg. The 3% reduced rate does not apply to design fees — only to qualifying construction and renovation labour directly linked to your principal residence.

Understanding the billing structure before signing is essential — the same project can look very different in cost depending on the model chosen.

Hourly billing The designer logs time for every task: site visits, calls, sourcing, drawing, supplier meetings. This model is transparent but unpredictable — a project with many client revision rounds can balloon well beyond initial estimates. Hourly is most appropriate for small, well-defined scopes (a single room restyle, a furniture sourcing brief) or ongoing advisory relationships.

In Luxembourg, expect invoicing every 2–4 weeks with time tracking attached. Request a maximum hours cap per phase in writing before starting.

Fixed-fee (forfait) The designer quotes a single price for a defined scope of work. This is the most common model for full apartment and house projects in Luxembourg. The risk is with the designer — they absorb overruns. For the client, it provides budget certainty and aligns the designer's incentive toward efficiency.

Fixed fees are typically quoted after a paid initial consultation (€150–300) where the designer assesses the space and brief. Never expect a serious designer to quote fixed fees without having visited.

Percentage of works Some Luxembourg designers charge a percentage of the total construction and furniture budget — typically 10–15%. This is common when the designer is acting as project manager overseeing multiple contractors. The advantage: fees scale with the project. The risk: it creates an incentive to recommend higher-specification (and more expensive) products.

Which model is right for you? For a defined renovation project with a clear brief: fixed fee. For ongoing advice, styling tweaks or second opinions: hourly. For a design-and-build where the designer coordinates all trades: percentage model.

When a Luxembourg interior designer quotes for a full project, the deliverables typically cover several distinct phases. Understanding what each phase includes helps you evaluate quotes and avoid paying twice for work already done.

Phase 1 — Discovery and concept (typically 10–15% of fee) Site visit, client brief, mood board, concept proposal with material and colour palette. Outcome: an agreed design direction before any detailed work begins.

Phase 2 — Design development (typically 30–40% of fee) Floor plans, elevation drawings, furniture layout, lighting plan, material specifications, custom joinery drawings if applicable. In Luxembourg, this phase often includes bilingual or trilingual documentation for clients who will share plans with French or German-speaking contractors.

Phase 3 — Technical drawings and supplier sourcing (typically 20–25% of fee) Construction-ready drawings for contractors, window and door schedules, kitchen and bathroom technical drawings. Supplier coordination: the designer approaches their vetted network of Luxembourg suppliers and obtains trade pricing — often 15–30% below retail for furniture and fixtures.

Phase 4 — Project management (typically 25–35% of fee) Site visits during construction, contractor coordination, quality control, punch list management at completion. This is where inexperienced clients most often underestimate value — a well-managed site runs on time and within budget; an unmanaged one rarely does.

What is typically NOT included

• Furniture and material purchases themselves (billed separately, sometimes at trade price + mark-up)
• Structural engineering or building permit applications (refer to an architect)
• Moving, cleaning or removal services

Always request a written scope of work before signing — ambiguity about phase boundaries is the most common source of fee disputes.

3D visualisation has become a standard offering from Luxembourg interior designers, particularly for projects above €50,000 in total renovation budget. The question is always whether the rendering fee (€500–2,500) delivers enough value to justify its cost.

When 3D rendering is genuinely useful

• Major spatial changes: moving walls, changing ceiling heights, creating open-plan layouts. Visualising the result before demolition eliminates costly last-minute changes.
• Material and finish selection: seeing how a specific tile, paint colour or wood floor reads in the actual light conditions of a room is far more reliable than a mood board sample.
• Client alignment in multi-stakeholder projects: couples, families or landlord-tenant relationships where multiple people must agree on the outcome.
• Expat clients buying off-plan or remotely: a 3D render of their future apartment before they relocate is often essential for making confident purchasing decisions.

Types of 3D rendering available

When 3D rendering adds limited value For cosmetic renovations (paint colour changes, furniture swaps), a flat mood board and material samples are usually sufficient. Spending €800 on a render to decide between two sofa colours is rarely justified.

What to ask your designer Check whether rendering is done in-house or outsourced. In-house rendering is faster for revision rounds. Outsourced rendering is cheaper but adds 5–10 day turnaround per revision — plan accordingly.

The distinction matters both legally and practically in Luxembourg. Confusing the two roles is one of the most common mistakes clients make when planning a renovation.

Architects (OAI-registered) In Luxembourg, architects must be registered with the Ordre des Architectes et Ingénieurs-Conseils (OAI). They are legally authorised to:

• Sign building permit applications
• Certify structural modifications
• Issue conformity certificates for new builds
• Certify energy performance compliance (CPE/PAG)

For any project involving structural changes — removing a load-bearing wall, building an extension, converting a loft — you need an OAI-registered architect. Without this, your commune will not issue a building permit.

Interior designers In Luxembourg, interior design is not a regulated profession — anyone can use the title. Interior designers focus on:

• Spatial planning within the existing envelope
• Material, colour and finish specification
• Furniture design and sourcing
• Decoration and styling

An interior designer cannot sign permit applications or certify structural works. If your project is purely cosmetic or involves non-structural reconfiguration, you do not legally need an architect.

The grey zone Kitchen extensions, velux additions, and terrace enclosures often sit in a regulatory grey zone. When in doubt, consult your commune's service urbanisme before starting. A single call costs nothing and avoids a stop-work order later.

Which do you need?

• Structural changes, permits required: OAI architect
• Cosmetic renovation, furniture, layout within existing walls: interior designer
• Complex projects (renovation + design): consider commissioning both and letting them coordinate